[PATCH] Fix producer string memory leaks

[Martin Liška]

Hello.

This fixes 2 memory leaks I noticed.
Patch can bootstrap on x86_64-linux-gnu and survives regression tests.

Ready to be installed?
Thanks,
Martin

gcc/ChangeLog:

        * opts-common.c (decode_cmdline_option): Release werror_arg.
        * opts.c (gen_producer_string): Release output of
        gen_command_line_string.
---
 gcc/opts-common.c | 1 +
 gcc/opts.c        | 7 +++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/gcc/opts-common.c b/gcc/opts-common.c
index 6cb5602896d..5e10edeb4cf 100644
--- a/gcc/opts-common.c
+++ b/gcc/opts-common.c
@@ -766,6 +766,7 @@ decode_cmdline_option (const char *const *argv, unsigned 
int lang_mask,
       werror_arg[0] = 'W';
 
       size_t warning_index = find_opt (werror_arg, lang_mask);
+      free (werror_arg);
       if (warning_index != OPT_SPECIAL_unknown)
        {
          const struct cl_option *warning_option
diff --git a/gcc/opts.c b/gcc/opts.c
index fc5f61e13cc..24bb64198c8 100644
--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -3401,8 +3401,11 @@ char *
 gen_producer_string (const char *language_string, cl_decoded_option *options,
                     unsigned int options_count)
 {
-  return concat (language_string, " ", version_string, " ",
-                gen_command_line_string (options, options_count), NULL);
+  char *cmdline = gen_command_line_string (options, options_count);
+  char *combined = concat (language_string, " ", version_string, " ",
+                          cmdline, NULL);
+  free (cmdline);
+  return combined;
 }
 
 #if CHECKING_P
--
2.30.0